许久没关注Oracle，没有想到Oracle12c都出来，不枉我注册的Oracle12c的Email。
ORACLE 12C中提出来CDB和PDB的概念,对于ORACLE的数据库来说,确实是一个新东西,他们可以分别理解为容器和插件(PDB插入在CDB中),CDB的管理和传统数据库区别不大,本篇文章对PDB的部分操作进行了简单说明(创建PDB,OPEN PDB,DROP PDB,Plug PDB,Unplugging PDB)
CREATE PDB
SQL> SELECT NAME,CDB FROM V$DATABASE; NAME CDB --------- --- XIFENFEI YES SQL> select pdb_id,pdb_name,dbid,STATUS,CREATION_SCN from dba_pdbs; PDB_ID PDB_NAME DBID STATUS CREATION_SCN ---------- ------------------------------ ---------- ------------- ------------ 2 PDB$SEED 4044122081 NORMAL 1661281 3 FF 1565322182 NORMAL 1720654 SQL> CREATE PLUGGABLE DATABASE xff_db ADMIN USER xff IDENTIFIED BY xifenfei 2 STORAGE (MAXSIZE 2G MAX_SHARED_TEMP_SIZE 100M) 3 DEFAULT TABLESPACE xifenfei 4 DATAFILE '/u01/app/oracle/oradata/xifenfei/xff/xifenfei01.dbf' SIZE 25M AUTOEXTEND ON 5 PATH_PREFIX = '/u01/app/oracle/oradata/xifenfei/xff/' 6 FILE_NAME_CONVERT = ('/u01/app/oracle/oradata/xifenfei/pdbseed/', 7 '/u01/app/oracle/oradata/xifenfei/xff/'); Pluggable database created. SQL> select pdb_id,pdb_name,dbid,STATUS,CREATION_SCN from dba_pdbs; PDB_ID PDB_NAME DBID STATUS CREATION_SCN ---------- ------------------------------ ---------- ------------- ------------ 2 PDB$SEED 4044122081 NORMAL 1661281 3 FF 1565322182 NORMAL 1720654 4 XFF_DB 2272981748 NEW 1771028 |
OPEN PDB
SQL> alter pluggable database xff_db open; Pluggable database altered. SQL> select pdb_id,pdb_name,dbid,STATUS,CREATION_SCN from dba_pdbs; PDB_ID PDB_NAME DBID STATUS CREATION_SCN ---------- ------------------------------ ---------- ------------- ------------ 2 PDB$SEED 4044122081 NORMAL 1661281 3 FF 1565322182 NORMAL 1720654 4 XFF_DB 2272981748 NORMAL 1771028 SQL> alter pluggable database all close immediate; Pluggable database altered. SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs; CON_ID DBID NAME OPEN_MODE ---------- ---------- ------------------------------ ---------- 2 4044122081 PDB$SEED READ ONLY 3 1565322182 FF MOUNTED 4 2272981748 XFF_DB MOUNTED SQL> alter pluggable database all open; Pluggable database altered. SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs; CON_ID DBID NAME OPEN_MODE ---------- ---------- ------------------------------ ---------- 2 4044122081 PDB$SEED READ ONLY 3 1565322182 FF READ WRITE 4 2272981748 XFF_DB READ WRITE |
Unplugging a PDB from a CDB
SQL> alter pluggable database FF close immediate; Pluggable database altered. SQL> alter pluggable database ff UNPLUG into '/tmp/ff.xml'; Pluggable database altered. |
DROP PDB
SQL> DROP PLUGGABLE DATABASE xff_db INCLUDING DATAFILES; Pluggable database dropped. SQL> DROP PLUGGABLE DATABASE ff INCLUDING DATAFILES; Pluggable database dropped. |
Plug Unplugged PDB into CDB
SQL> SELECT NAME,CDB FROM V$DATABASE; NAME CDB --------- --- XFF_L YES SQL> create pluggable database ff using '/tmp/ff.xml' 2 copy file_name_convert=('/u01/app/oracle/oradata/xifenfei/FF/','/u01/app/oracle/oradata/xff_l/xff'); Pluggable database created. SQL> exec DBMS_PDB.SYNC_PDB(); PL/SQL procedure successfully completed. SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs; CON_ID DBID NAME OPEN_MODE ---------- ---------- ------------------------------ ---------- 2 4043918109 PDB$SEED READ ONLY 3 2346805300 LX1 MOUNTED 4 2385557792 LX2 MOUNTED 5 1565384817 FF MOUNTED SQL> alter pluggable database all open; Pluggable database altered. SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs; CON_ID DBID NAME OPEN_MODE ---------- ---------- ------------------------------ ---------- 2 4043918109 PDB$SEED READ ONLY 3 2346805300 LX1 READ WRITE 4 2385557792 LX2 READ WRITE 5 1565384817 FF READ WRITE SQL> select name from v$datafile; NAME-------------------------------------------------------------------------------- /u01/app/oracle/oradata/xff_l/system01.dbf /u01/app/oracle/oradata/xff_l/pdbseed/system01.dbf /u01/app/oracle/oradata/xff_l/sysaux01.dbf /u01/app/oracle/oradata/xff_l/pdbseed/sysaux01.dbf /u01/app/oracle/oradata/xff_l/undotbs01.dbf /u01/app/oracle/oradata/xff_l/users01.dbf /u01/app/oracle/oradata/xff_l/LX1/system01.dbf /u01/app/oracle/oradata/xff_l/LX1/sysaux01.dbf /u01/app/oracle/oradata/xff_l/LX1/LX1_users01.dbf /u01/app/oracle/oradata/xff_l/LX2/system01.dbf /u01/app/oracle/oradata/xff_l/LX2/sysaux01.dbf /u01/app/oracle/oradata/xff_l/LX2/LX2_users01.dbf /u01/app/oracle/oradata/xff_l/xffsystem01.dbf /u01/app/oracle/oradata/xff_l/xffsysaux01.dbf /u01/app/oracle/oradata/xff_l/xffSAMPLE_SCHEMA_users01.dbf /u01/app/oracle/oradata/xff_l/xffexample01.dbf 16 rows selected. |
补充说明:本部分内容比较多,本篇blog,只是对其中的很小一部分进行了测试,确实证明可以对pdb实现在不同的cdb中实现迁移,对于该项操作,可以在dbca和gc中实现相同操作.由于12c数据库尚未正式发布,该部分功能只是出于个人测试目的.
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